• Journal of Navigation and Port Research
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• v.43 no.6
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• pp.403-412
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• 2019

The characteristics of the manoeuvring motion of a ship are dependent on the ship type, as well as draft or speed in the same ship. In recent years, the number of extra-large vessels has increased significantly, which can cause enormous material and environmental damage in the event of a marine accident. Thus, the importance of ship maneuvering is increasing. The IMO has forced the officers to be trained in simulators through the STCW 95 amendment. However, FMSS is costly and difficult to access and the PC-based simulator has the disadvantage that only one person can engage in simulation. The purpose of this study was to solve the shortcomings of the FMSS and PC-based simulators by enabling multiple people to use their PCs to simulate based on a network. The simulator is implemented through the analysis and numerical calculation of the Nomoto model, Radar function mounting, data transfer protocol design, and GUI building. To verify the simulator, the simulation results were compared and analyzed with the test results of T.S. HANBADA according to the criteria of the Korean Register of Shipping(KR) and IMO standards for ship maneuverability. As a result, It showed a relative error of 0%~ 32.1% with an average of 13.7%, and it satisfied the IMO criteria for ship maneuverability.

• Journal of the korean Society of Automotive Engineers
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• v.25 no.3
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• pp.25-29
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• 2003

한국타이어 동역학연구팀은 약 10여년전 처음 독립부서로 만들어져 현재 실차 시험 전문 드라이버들을 포함해서 연구인력만 약 20여명 되는 연구팀으로 발전했다. 동역학연구팀에서 수행되고 있는 업무는 성능 별로 크게 쏠림, 조종안정성, 제동, 승차감 등으로 나뉠 수 있으나 이번 기회에는 주로 조종안정성에 대한 연구활동에 대해 소개하고자 한다.

• Bulletin of the Society of Naval Architects of Korea
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• v.34 no.1
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• pp.38-49
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• 1997

지난 2년 5개월 동안 대표적인 지속비대선인 SUEZMAX, 40K PC, AFRAMAX에 대한 체계적인 시험을 수행하여 자료를 확보하고, 이를 분석, 정리하여 새로운 저속비대선의 조종성 추정 프로그램을 확보함으로써 선박의 초기설계 단계에서 유용하게 사용할 수 있게 되었다.

• Journal of Advanced Navigation Technology
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• v.9 no.2
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• pp.185-192
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• 2005

The aim of this paper is to analyze handling qualities of tiltrotor aircraft(TR-S4) in helicopter flight mode including hovering and forward flight. Analysis of handling qualities is composed of aircraft response to control inputs that effect on stability and controllability. In short term response analysis, bandwidth is the critical parameter for small amplitude motions since it relates to the ability of a pilot to crisply start and stop maneuver. The handling qualities of TR-S4 in helicopter mode are analyzed with a SAS and an attitude controller and are satisfied level 1 in almost criteria with simulation of TR-S4 6-DOF nonlinear model.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.44 no.4
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• pp.324-332
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• 2016

In this paper, the terminal homing loop with a IIR-type strapdown seeker and a roll rate gyroscope is proposed. Basically, the proposed homing loop is based on the look-angle-control guidance. Since the range of the seeker is strictly limited, the missile is delivered to a point to lock the target on the seeker via non-guided flight during the midcourse guidance. The non-standard firing table is developed to compensate the wind and the target movement. To secure the delay margin is very important to prevent the instability of the homing loop when the time delay of the seeker is included. To validate the proposed homing loop, the 6-DOF nonlinear simulation is performed, and the Monte-Carlo simulation is also done for checking the robustness for the various kinds of uncertainty.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2010.10a
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• pp.38-39
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• 2010

최근들어 항만건설 및 선박블록 운송의 증가로 대형 부선을 예인하는 예부선과 침몰 선박 인양 및 해상교량공사 등을 위한 해상크레인 운송선단의 통항이 매년 증가 추세에 있다. 우리나라에서 이들 선박의 주 항로는 남해와 서해 연안으로, 이 지역은 도서가 산재해 있고 협수로가 많은 지형적 특성과 연안으로 근접하여 항해 시 강한 조류의 영향을 받으며, 또한 어망과 조업중인 어선들과 많이 조우하게 된다. 특히, 돌발적인 해양 기상적 특징을 포함하고 있다. 이러한 영향에 따라서 이 해역을 통항하는 예부선 및 해상크레인 선단의 조종성능이 크게 저하되어 해양사고의 위험성이 고조되고 있다. 이에 따라서, 이 연구에서는 해상크레인의 연안해역 예항시 안전하게 항해할 수 있는 적절한 조종 방법을 고찰하여 안전운항에 기여하고자 한다.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.30 no.4
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• pp.84-91
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• 2002

Thrust vector characteristics of jet vanes installed in a shroud are very unique and much more complicated than those of the jet vane acting without any shroud by the fact of additional physical phenomena. The fluid dynamic interferences induced by jet vanes and shroud as well as jet vane's aerodynamic performance are investigated to characterize thrust vector control by semi-empirical model, three dimensional numerical analysis including real complex geometry, and ground firing test of real motors.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.366-368
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• 2012

선박조종시뮬레이션의 평가항목 중 운항자[주관적] 평가는 선박조종 시뮬레이션을 선박운항자가 안전진단대상사업으로 인하여 느끼는 심리적 부담 또는 위험도를 평가하는 것이다. 해상교통안전진단 시행지침 상 운항자[주관적] 평가의 결과가 평균-2.0이상인 경우 해상교통환경 변화에 따른 통항 및 접이안 안전성 확보가 가능하다고 평가하고 있으나 정성적인 평가기준 -2.0에 대한 명확한 근거가 부족하였다. 이에 본 연구에서는 현재까지 제출된 진단보고서 중 116건의 시뮬레이션 결과 나타난 운항자[주관적] 평가값을 사업대상별로 분류하여 톤수, 선종, 입출항별 분석을 통한 문제점을 도출하고 이에 대한 기술기준 개선(안)을 제시하였다.

• Journal of the Society of Naval Architects of Korea
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• v.46 no.3
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• pp.259-267
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• 2009

Recently, ship maneuverability has been very important issue due to accidents of frequent occurrence at sea. IMO standards for ship maneuverability were applied from January 1, 2004. In this study, maneuverability model tests were considered through a 2m-class KVLCC1 in the Ocean Engineering Wide Tank at University of Ulsan(UOU). Circular Motion Test(CMT) was performed to obtain the maneuvering coefficients by using X-Y Carriage. The trajectories simulated using the coefficients are compared with those of PMM test and free running test.

• Journal of the Society of Naval Architects of Korea
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• v.33 no.4
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• pp.1-14
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• 1996

Especially in the case of a full form ship, the stability on course can be considered to become severest among 4 items of criteria in Interim Standards for Ship Maneuverability adopted by IMO in 1993. The purpose of this study is to find some ideas for the improvement of stability on course through changes in rudder area with reference to span distance. In this paper, we established the formula on the relation between the experimental constants relevant to rudder normal force and hydrodynamic derivatives of hull-propeller-rudder system. We carried out various kinds of captive model test relevant to rudder normal force etc., and evaluated hydrodynamic derivatives of hull-propeller-rudder system, and analyzed the stability on course with the parameter of changes in rudder area. Furthermore, we also discussed effects of changes in rudder area on maneuvering performance including stability on course, based on computer simulation. As a result, it is clarified that there is a possibility that stability on course may become bad through an increase of rudder area. The reason for the bad stability on course is that the void space between the upper edge of rudder and the lower part of stern overhang decreases. This space change exerts a great influence on straightening coefficient of incoming flow to rudder in maneuvering motion, which has close relation to stability on course.